Answer :
There is a "forbidden fruit" aspect to both stories, (quite literally in the case of Adam and Eve) where there is something they aren't meant to touch, but can't resist finding out/end up doing so anyway. In both stories this ends with bad consequences. In the case of Adam and Eve, original sin is created and they are banished from the garden of Eden, in Pandora's case, the worlds troubles and horrors are let out of the box. In a way both stories are a mythological explanation for evil and wrongdoing in the world, a way to explain why things can be terrible and where that originated from.